Pentax K-3 III vs Sony A7R III
The Pentax K-3 III and the Sony Alpha A7R III are two enthusiast cameras that were revealed to the public, respectively, in March 2021 and October 2017. The K-3 III is a DSLR, while the A7R III is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (K-3 III) and a full frame (A7R III) sensor. The Pentax has a resolution of 25.6 megapixels, whereas the Sony provides 42.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Pentax K-3 III and the Sony Alpha A7R III? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
An illustration of the physical size and weight of the Pentax K-3 III and the Sony A7R III is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.
The K-3 III can be obtained in two different colors (black, silver), while the A7R III is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A7R III is notably smaller (13 percent) than the Pentax K-3 III. Moreover, the A7R III is markedly lighter (21 percent) than the K-3 III. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
Concerning battery life, the K-3 III gets 800 shots out of its D-LI90 battery, while the A7R III can take 650 images on a single charge of its NP-FZ100 power pack. The power pack in the A7R III can be charged via the USB port, which can be very convenient when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.
|1.||Pentax K-3 III||135 mm||104 mm||74 mm||820 g||800||Y||Mar 2021||1,999||amazon.com|
|2.||Sony A7R III||127 mm||96 mm||74 mm||650 g||650||Y||Oct 2017||3,199||ebay.com|
|3.||Fujifilm X-T4||135 mm||93 mm||64 mm||607 g||500||Y||Feb 2020||1,699||amazon.com|
|4.||Fujifilm X-H1||140 mm||97 mm||86 mm||673 g||310||Y||Feb 2018||1,899||ebay.com|
|5.||Nikon Z6 II||134 mm||101 mm||70 mm||705 g||410||Y||Oct 2020||1,999||amazon.com|
|6.||Nikon Z7||134 mm||101 mm||67 mm||675 g||330||Y||Aug 2018||3,399||ebay.com|
|7.||Panasonic S5||133 mm||98 mm||82 mm||714 g||440||Y||Sep 2020||1,999||amazon.com|
|8.||Pentax KP||132 mm||101 mm||76 mm||703 g||390||Y||Jan 2017||1,099||ebay.com|
|9.||Pentax K-70||126 mm||93 mm||74 mm||688 g||410||Y||Jun 2016||649||amazon.com|
|10.||Pentax K-S2||123 mm||91 mm||73 mm||678 g||410||Y||Feb 2015||749||ebay.com|
|11.||Pentax K-3 II||131 mm||100 mm||77 mm||800 g||720||Y||Apr 2015||1,099||ebay.com|
|12.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299||ebay.com|
|13.||Pentax K-5 II||131 mm||97 mm||73 mm||760 g||740||Y||Sep 2012||1,099||ebay.com|
|14.||Sony A1||129 mm||97 mm||81 mm||737 g||530||Y||Jan 2021||6,499||amazon.com|
|15.||Sony A7S III||127 mm||97 mm||81 mm||699 g||600||Y||Jul 2020||3,499||amazon.com|
|16.||Sony A7R II||127 mm||96 mm||60 mm||625 g||290||Y||Jun 2015||3,199||ebay.com|
|17.||Sony A7S II||127 mm||96 mm||60 mm||627 g||370||Y||Sep 2015||2,999||ebay.com|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The K-3 III was launched at a markedly lower price (by 38 percent) than the A7R III, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Pentax K-3 III features an APS-C sensor and the Sony A7R III a full frame sensor. The sensor area in the A7R III is 139 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 42.2MP, the A7R III offers a higher resolution than the K-3 III (25.6MP), but the A7R III nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.76μm for the K-3 III) due to its larger sensor. However, the K-3 III is a much more recent model (by 3 years and 5 months) than the A7R III, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.
The resolution advantage of the Sony A7R III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7R III for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. The corresponding values for the Pentax K-3 III are 31 x 20.6 inches or 78.6 x 52.4 cm for good quality, 24.8 x 16.5 inches or 62.9 x 41.9 cm for very good quality, and 20.6 x 13.8 inches or 52.4 x 35 cm for excellent quality prints.
The A7R III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
Both cameras have the capacity to capture high quality composite images by combining multiple shots after shifting the sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).
The Pentax K-3 III has a native sensitivity range from ISO 100 to ISO 160000. The corresponding ISO settings for the Sony Alpha A7R III are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.
In terms of underlying technology, the K-3 III is build around a CMOS sensor, while the A7R III uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|1.||Pentax K-3 III||APS-C||25.6||6192||4128||4K/30p||24.2||13.7||2083||85|
|2.||Sony A7R III||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|5.||Nikon Z6 II||Full Frame||24.3||6048||4024||4K/60p||25.0||14.4||3303||94|
|6.||Nikon Z7||Full Frame||45.4||8256||5504||4K/30p||26.3||14.6||2668||99|
|7.||Panasonic S5||Full Frame||24.0||6000||4000||4K/60p||25.1||14.5||2697||94|
|11.||Pentax K-3 II||APS-C||24.1||6016||4000||1080/60i||23.6||13.6||1106||80|
|13.||Pentax K-5 II||APS-C||16.1||4928||3264||1080/25p||23.8||14.1||1235||82|
|14.||Sony A1||Full Frame||49.8||8640||5760||8k/30p||25.9||14.5||3163||98|
|15.||Sony A7S III||Full Frame||12.0||4240||2832||4K/120p||23.7||13.9||2520||86|
|16.||Sony A7R II||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|17.||Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, and both provide the same movie specifications (4K/30p).
Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7R III has an electronic viewfinder (3686k dots), while the K-3 III has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the A7R III has a higher magnification than the one of the K-3 III (0.78x vs 0.70x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Pentax K-3 III and Sony A7R III along with similar information for a selection of comparators.
|1.||Pentax K-3 III||optical||Y||3.2 / 1620||fixed||Y||1/8000s||12.0/s||n||Y|
|2.||Sony A7R III||3686||n||3.0 / 1440||tilting||Y||1/8000s||10.0/s||n||Y|
|3.||Fujifilm X-T4||3690||n||3.0 / 1620||swivel||Y||1/8000s||15.0/s||n||Y|
|4.||Fujifilm X-H1||3690||Y||3.0 / 1040||full-flex||Y||1/8000s||14.0/s||n||Y|
|5.||Nikon Z6 II||3690||Y||3.2 / 2100||tilting||Y||1/8000s||14.0/s||n||Y|
|6.||Nikon Z7||3690||Y||3.2 / 2100||tilting||Y||1/8000s||9.0/s||n||Y|
|7.||Panasonic S5||2360||n||3.0 / 1840||swivel||Y||1/8000s||7.0/s||n||Y|
|8.||Pentax KP||optical||n||3.0 / 921||tilting||n||1/6000s||7.0/s||Y||Y|
|9.||Pentax K-70||optical||n||3.0 / 921||swivel||n||1/6000s||6.0/s||Y||Y|
|10.||Pentax K-S2||optical||n||3.0 / 921||swivel||n||1/6000s||5.4/s||Y||Y|
|11.||Pentax K-3 II||optical||Y||3.2 / 1037||fixed||n||1/8000s||8.3/s||n||Y|
|12.||Pentax K-3||optical||Y||3.2 / 1037||fixed||n||1/8000s||8.3/s||Y||Y|
|13.||Pentax K-5 II||optical||Y||3.0 / 921||fixed||n||1/8000s||7.0/s||Y||Y|
|14.||Sony A1||9437||n||3.0 / 1440||tilting||Y||1/8000s||10.0/s||n||Y|
|15.||Sony A7S III||9440||n||3.0 / 1440||swivel||Y||1/8000s||10.0/s||n||Y|
|16.||Sony A7R II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0/s||n||Y|
|17.||Sony A7S II||2400||n||3.0 / 1229||tilting||n||1/8000s||5.0/s||n||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One feature that is present on the K-3 III, but is missing on the A7R III is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.
The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the A7R III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).
The Pentax K-3 III and the Sony A7R III both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The K-3 III writes its imaging data to SDXC cards, while the A7R III uses SDXC or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. Both the K-3 III and the A7R III support UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s) on the first slot and UHS-I cards (104 MB/s) on the second one.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Pentax K-3 III and Sony Alpha A7R III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Pentax K-3 III||Y||stereo / mono||Y||Y||micro||3.2||Y||-||Y|
|2.||Sony A7R III||Y||stereo / mono||Y||Y||micro||3.1||Y||Y||Y|
|3.||Fujifilm X-T4||Y||stereo / mono||Y||-||micro||3.1||Y||-||Y|
|4.||Fujifilm X-H1||Y||stereo / mono||Y||-||micro||3.0||Y||-||-|
|5.||Nikon Z6 II||Y||stereo / mono||Y||Y||micro||3.2||Y||-||Y|
|6.||Nikon Z7||Y||stereo / mono||Y||Y||micro||3.1||Y||-||Y|
|7.||Panasonic S5||Y||stereo / mono||Y||Y||micro||3.2||Y||-||Y|
|8.||Pentax KP||Y||stereo / mono||Y||-||-||2.0||Y||-||-|
|9.||Pentax K-70||Y||stereo / mono||Y||-||mini||2.0||Y||-||-|
|10.||Pentax K-S2||Y||mono / mono||Y||-||micro||2.0||Y||Y||-|
|11.||Pentax K-3 II||Y||mono / mono||Y||Y||mini||3.0||-||-||-|
|12.||Pentax K-3||Y||mono / mono||Y||Y||mini||3.0||-||-||-|
|13.||Pentax K-5 II||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|14.||Sony A1||Y||stereo / mono||Y||Y||full||3.2||Y||-||Y|
|15.||Sony A7S III||Y||stereo / mono||Y||Y||full||3.2||Y||-||Y|
|16.||Sony A7R II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|17.||Sony A7S II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
Travel and landscape photographers will find it useful that the K-3 III has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
The K-3 III is a recent model that features in the current product line-up of Pentax. In contrast, the A7R III has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7R III was succeeded by the Sony A7R IV. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Pentax and Sony websites.
So what is the bottom line? Which of the two cameras – the Pentax K-3 III or the Sony A7R III – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.
Arguments in favor of the Pentax K-3 III:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1620k vs 1440k dots).
- Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
- Longer lasting: Can take more shots (800 versus 650) on a single battery charge.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Faster data transfer: Supports a more advanced USB protocol (3.2 vs 3.1).
- More affordable: Was introduced into a lower priced category (38 percent cheaper at launch).
- More modern: Reflects 3 years and 5 months of technical progress since the A7R III launch.
Advantages of the Sony Alpha A7R III:
- More detail: Has more megapixels (42.2 vs 25.6MP), which boosts linear resolution by 28%.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- More framing info: Has an electronic viewfinder that displays shooting data.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- More compact: Is smaller (127x96mm vs 135x104mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 170g or 21 percent) and is thus easier to take along.
- Easier travel charging: Can be conveniently charged via its USB port.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More heavily discounted: Has been around for much longer (launched in October 2017).
If the number of relative strengths (bullet points above) is taken as a guide, the A7R III emerges as the winner of the match-up (12 : 10 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Pentax K-3 III and the Sony A7R III place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the K-3 III and the A7R III in practical situations. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.
This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
|1.||Pentax K-3 III||4/5||..||3/5||..||4.5/5||..||Mar 2021||1,999||amazon.com|
|2.||Sony A7R III||..||+ +||4/5||90/100||4.5/5||5/5||Oct 2017||3,199||ebay.com|
|3.||Fujifilm X-T4||5/5||+ +||5/5||88/100||5/5||5/5||Feb 2020||1,699||amazon.com|
|4.||Fujifilm X-H1||..||+||5/5||86/100||4.5/5||4.5/5||Feb 2018||1,899||ebay.com|
|5.||Nikon Z6 II||4.5/5||..||4/5||89/100||4.5/5||4.5/5||Oct 2020||1,999||amazon.com|
|6.||Nikon Z7||5/5||+||4.8/5||89/100||4.5/5||5/5||Aug 2018||3,399||ebay.com|
|7.||Panasonic S5||4.5/5||+ +||4.5/5||88/100||4.5/5||4.5/5||Sep 2020||1,999||amazon.com|
|8.||Pentax KP||4/5||..||3/5||82/100||5/5||4.5/5||Jan 2017||1,099||ebay.com|
|9.||Pentax K-70||4.5/5||..||..||79/100||4.5/5||4.5/5||Jun 2016||649||amazon.com|
|10.||Pentax K-S2||4.5/5||..||..||..||5/5||4.5/5||Feb 2015||749||ebay.com|
|11.||Pentax K-3 II||4.5/5||..||..||..||5/5||5/5||Apr 2015||1,099||ebay.com|
|12.||Pentax K-3||4/5||..||..||83/100||5/5||5/5||Oct 2013||1,299||ebay.com|
|13.||Pentax K-5 II||5/5||..||..||80/100||5/5||4.5/5||Sep 2012||1,099||ebay.com|
|14.||Sony A1||5/5||o||4.5/5||93/100||4.5/5||5/5||Jan 2021||6,499||amazon.com|
|15.||Sony A7S III||..||+ +||5/5||91/100||4.5/5||5/5||Jul 2020||3,499||amazon.com|
|16.||Sony A7R II||5/5||+ +||5/5||90/100||5/5||5/5||Jun 2015||3,199||ebay.com|
|17.||Sony A7S II||5/5||+||..||..||4.5/5||5/5||Sep 2015||2,999||ebay.com|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.
Other camera comparisons
Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon 850D vs Pentax K-3 III
- Fujifilm X-E4 vs Pentax K-3 III
- Leica M-E Typ 240 vs Pentax K-3 III
- Nikon Z6 vs Sony A7R III
- Nikon Z7 vs Sony A7R III
- Olympus E-300 vs Pentax K-3 III
- Olympus E-M1 III vs Sony A7R III
- Panasonic ZS200 vs Sony A7R III
- Pentax K-1 II vs Pentax K-3 III
- Pentax K-3 III vs Sony WX800
- Ricoh GR vs Sony A7R III
- Ricoh WG-6 vs Sony A7R III
Specifications: Pentax K-3 III vs Sony A7R III
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Pentax K-3 III||Sony A7R III|
|Camera Type||Digital single lens reflex||Mirrorless system camera|
|Camera Lens||Pentax K mount lenses||Sony E mount lenses|
|Launch Date||March 2021||October 2017|
|Launch Price||USD 1,999||USD 3,199|
|Sensor Specs||Pentax K-3 III||Sony A7R III|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||23.3 x 15.5 mm||35.9 x 24.0 mm|
|Sensor Area||361.15 mm2||861.6 mm2|
|Sensor Diagonal||28 mm||43.2 mm|
|Sensor Resolution||25.6 Megapixels||42.2 Megapixels|
|Image Resolution||6192 x 4128 pixels||7952 x 5304 pixels|
|Pixel Pitch||3.76 μm||4.52 μm|
|Pixel Density||7.08 MP/cm2||4.90 MP/cm2|
|Moiré control||no AA filter||no AA filter|
|Movie Capability||4K/30p Video||4K/30p Video|
|ISO Setting||100 - 160,000 ISO||100 - 32,000 ISO|
|ISO Boost||no Enhancement||50 - 102,400 ISO|
|Image Processor||PRIME V||BIONZ X|
|DXO Sensor Quality (score)||..||100|
|DXO Color Depth (bits)||..||26.0|
|DXO Dynamic Range (EV)||..||14.7|
|DXO Low Light (ISO)||..||3523|
|Screen Specs||Pentax K-3 III||Sony A7R III|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||3686k dots|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.2inch||3.0inch|
|LCD Resolution||1620k dots||1440k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Shooting Specs||Pentax K-3 III||Sony A7R III|
|Focus System||Phase-detect AF||On-Sensor Phase-detect|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000s||1/8000s|
|Continuous Shooting||12 shutter flaps/s||10 shutter flaps/s|
|Shutter Life Expectancy||200 000 actuations||500 000 actuations|
|Electronic Shutter||no E-Shutter||YES|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Image Stabilization||In-body stabilization||In-body stabilization|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Dual card slots||Dual card slots|
|UHS card support||Single UHS-II||Single UHS-II|
|Connectivity Specs||Pentax K-3 III||Sony A7R III|
|Studio Flash||PC Sync socket||PC Sync socket|
|USB Connector||USB 3.2||USB 3.1|
|HDMI Port||micro HDMI||micro HDMI|
|Microphone Port||External MIC port||External MIC port|
|Headphone Socket||Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||Bluetooth built-in||Bluetooth built-in|
|Geotagging||GPS built-in||no internal GPS|
|Body Specs||Pentax K-3 III||Sony A7R III|
|Environmental Sealing||Weathersealed body||Weathersealed body|
|Battery Life (CIPA)||800 shots per charge||650 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
135 x 104 x 74 mm
(5.3 x 4.1 x 2.9 in)
127 x 96 x 74 mm
(5.0 x 3.8 x 2.9 in)
|Camera Weight||820 g (28.9 oz)||650 g (22.9 oz)|
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